Bench-vise.



T. A. VGAIINUE. BENGH VIsB.

APPLICATION FILED DBO. 8, 1909- 983, 1 Patented Jan 31, 1911.

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THOMAS A. GANNOE, OF WARREN, PENNSYLVANIA.

IBENGH-VISE.

Specification of Letters Patent.

rati-,atea aan. 31, 1911.

Application lea December 8, 1909. Serial No. 531,959.

To all whom 'it may concern:

Be it known that I, THOMAS A. GANNon, a citizen of the United States, residing at Warren, in the county of Warren and State of Pennsylvania, have invented new and useful Improvements in Bench- Vises, of

which the following is a specification.

This invention is an improved bench vise for use by machinists and other artisans and consists in the construction, combination and arrangement of devices hereinafter described and claimed.

One object of my invention is to effect improvements in the construction of a vise of this class whereby one of the jaws is caused to frictionally grip an element of the other jaw when the jaws are closed by the operating screw and cause the jaws to be the more firmly held in closed or gripped position on the work.

A further object of the invention is to etl'ect improvements in the construction of the vise whereby when the jaws are closed by the action of the operating` screw, the housing or body portion of the vise which carries one of the jaws is gripped upon the base to prevent pivotal or angular movement of the vise.

In the accompanying drawings Figure 1 is a vertical longitudinal central sectional View of a bench vise constructed in accordance with my invention. Fig. 2 is a detail elevation of the body or housing of the vise. Fig. 3 is a similar View of the nut which is engaged by the operating screw. Fig. 4 is a vert-ical transverse sectional view of my improved bench vise on the plane indicated by the line a-a of Fig. 1. Fig. 5 is a detail plan of the body or housing portion of the vise.

In the embodiment of the invention here shown, the base plate 1, which is circular, and which may be secured by any suitable means on a bench or other suitable supporting object is provided in its upper side with a circular recess 2 at its center on its upper side with an upwardly extending cylindrical boss 8. The body or housing of the vise comprises the lower portion 5 and a pair of vertical walls or webs G which rise therefrom, are properly spaced apart and form a guideway 7 between them. The under side of the body or housing is formed with a cylindrical boss 8 to fit into the recess 2 and with a central opening to receive the cylindrical bossI 9 of the base, so as to adapt the body of the vise for pivotal or angular movement on the base and to connect said body or housing to the base.

An arm l() is fitted in the lower portion of the guideway 7, is movable longitudinally in said guideway and bears on that portion of the body or housing 4 which forms the bottom of said guideway. The said arm 10 is hollow, is open on its lower side, and is formed with a solid portion 11 which closes its outer end and is also formed at its outer end with a jaw 12.

A jaw 13 which is opposed to the jaw 12 has an extended base or arm 14 which is itted between the webs or sides 6 of the base or housing 4 and is mounted for movement in the-upper side of the guideway toward and from the upper side of t-he arm 10. A pivot bolt 15 passes through alined openings in the front portions of the walls or webs 6 and the front portion of the arm 14 of the jaw 13 so that said jaw is pivotally mounted for angular movement toward and from the upper side of the arm 10 of the jaw 12, and a bolt 16 also passes through openings in the rear portions of the walls 6 and an opening 17 in the arm 14 of the jaw 13, the said opening 17 being somewhat elongated to permit of lateral or angular play of the end of the arm 14 on said bolt 16 so that the base or arm portion 14 of the jaw 18 is adapted for movement to and from the opposed upper side of the arm 10 of the jaw 12. A plate 18 is detachably fitted in a recess 19 in the upper side of the lower portion 5 of the body or housing 4 and is formed near one end and on its upper side with a nut 20, which is disposed within the hollow arm 10. Un the under side of the said plate 18 and near the opposite end of t-he said plate 18 is a depending bolt or screw stem 21 which extends through central alined openings in the base 1 and the lower portion 5 in the body or housing 4. A washer 2 on said screw stem bears against the lower side of the center of the base 1 and also against the lower side of the boss 3 and a nut 23 is screwed on the said screw stem or bolt, the latter serving to secure the housing on the base 1 while permitting angular movement thereof so that the vise can be turned as may be required. It will be observed upon reference-to the drawings, particularly Fig. 1, that the nut 2O is eccentrically disposed with reference to the screw 21. The operating screw 24 of the jaw 12 engages the threads in the -nut 20, its major portion is-disposed when the jaw 12 is moved toward the jawV 13 so as .to close the jaws on opposite sides of'the work Igrippedbetween them, Vthe :torceV ofthe screwwill partly Yturn thejaw 13 on itspivot 15 so that that portion ofithearm orfbase of kthe jaw"'13 which 'is oppositelthe pivot 15 will move .angular-ly .toward the arm `10 andfrictionally grip andbite upon the same and `cause Ait ;to co-act with `,the screw in rmly locking 'the jaws in closed position on the work andgreatlyadd tothe security with 'which the work` is held between the aws.

r1`he action of the operatingscrew 2e in closing thejaws'also,fbyreason o'f'the eccentric -relation of the nut'20lto the bolt or screw stem 21 will tend'to tilt or incline/the plate `18and,hence, cause the screw stem 21 to draw the Ehousing 4 Ato the base '1 and frictionally grip :the same, thus Iloclringthe housingon the hase against angular move inentuntil the aws are released.

-a -housing swiveled thereon, a bolt connect- .iingathe-.housing to the base, a hollow jaw arm slidably mounted in the housing and having a jaw thereon, a plate integral with the bolt and seated in said housing, a nut on the .plate oilsetrom `the bolt, a screw carried 4bythe jaw and lying yin lthe lhollow arm Vin engagement `with the said nut, a second `jaw pivoted to the housing, said screw serving vwhenrthe jaws vare closed to tilt the ,plate and cause the lloolt to clamp the housing on the base, an .extension .end on the secondjaw adapted tozhethrown into engagement .withtheaw arm when pressure is placed onrsaid second jaw, and ineansto limit'the movement of said extension end.

In testimony whereof I affix my signature inpresence of'two witnesses'.

THOMAS A. GANNOE.

Vitnesses VICTOR GRANQUIST, N. 4(urnANQUIsCL. 

